package com.qk.filter;

import com.qk.utils.JwtUtils;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

@Slf4j
//@WebFilter("/*")   // 路径拦截器
public class TokenFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //获取当前url
        String url = request.getRequestURI();
        //判断是否是登录请求
        if(url.contains("login")){
            log.info("登录请求");
            filterChain.doFilter(request,response);
            return;
        }
        //获取请求头token
        String token = request.getHeader("token");
        if (token == null || token.isEmpty()){
            log.info("token为空");
            response.setStatus(401);
            return;
        }
        //判断是否有token
        try{
            JwtUtils.parseToken(token);
        }catch(Exception e) {
            log.info("token解析失败");
            response.setStatus(401);
            return;
        }
        //放行
        log.info("登陆成功");
        filterChain.doFilter(request,response);
    }
}
